In the early stages of pregnancy, the uterus is still in the pelvic cavity, and there is no obvious bulge in the abdomen, so pregnant women can sleep in any position, and it is rare that they will turn over and experience stomach pain. If a pregnant woman rolls over and pulls to the stomach pain, it may be due to its own combination of chronic pelvic inflammatory disease, there may also be a slight symptom of pre-miscarriage, for the middle and late pregnancy of women due to the uterus is more obvious, with the uterus increases may pull to the abdominal wall muscle ligaments, in the process of rolling over and pull to the stomach pain, is considered to belong to the physiological symptoms. As the uterus increases in size, it may pull on the surrounding ligaments or muscles and cause pain, but the pain is short-lived and not particularly severe.